Vault-light.



W. L. WALKER. VAULT LIGHT. APPLICATION FILED novzfs. 191s.

Patented Mar. 5, 1918.

4 .W W/ U n w r 5 n,a mu 1% 4 F J B 2 z ornate.

WILLIAM I4. WALKER, OF NEW YORK, N. Y.

VAULT-LIGHT.

Application filed November 15,1916.

To all whom it may concern:

Be it known that 1, WILLIAM L. WALKER, a citizen of the United States, and resident of New York, in the county of New York and State of New York, have invented new and useful Improvements in Vault-Lights, of which the following is a specification.

This invention relates to lights of the general type comprising essentially a plurality of lenses suitably secured within a frame, such as are commonly used for lighting vaults, basements, cellars and the like. Its principal object is to provide a lens wh ch can be readily and securely installed with an air tight and water tight joint between it and theframe and at the same time is readily removable as the lenses become chipped or broken in service.

Referring to the drawings which illustrate certain embodiments of my invention,

Figure lis a vertical central section of my improved lens and frame;

Fig. 2 is a similar view of a modified form;

Fig. 3 is a bottom plan view of the lens shown in Figs. 1 and 2;

Figs.4 and 6 arevertical central sections of other modified forms;

Fig. 5 is a section on the line 55 Flg. 4;; and

Fig. 7 is a perspective view of the fastening bolt shown in Fig. 4..

Referring to Fig. 1, A is a cast 1ron frame and jacket of usual construction but havlng in addition a shoulder or seat A and a tapering inner wall above said seat. B is the lens, T-shaped in cross sect1on, adapted to rest on the seat A and provided with a T-shaped slot B adapted to receive a headed fastening bolt 0. At and near lts top the lens is formed with a taper corresponding to the taper of the inner wall of the acket A. Preferably a washer or cushion D of rubber, or similar compressible material, 1S held between the lens and the head of the bolt C. A bushing E of rubber or other suitable compressible material is held between the tapered portions of the lens and acket and extends from the top of the jacket over the seat A. v

F is a metal rod extending across and engaging the bottom of the jacket and having an aperture to permit the passage therethrough of the threaded end of the bolt 0 which has a nut G.

Specification of Letters Patent.

Patented Mar. 5, 1918.

Serial No. 131,539.

It will I believe be clear that when the nut G is tightened, the lens B is drawn down on to its seat A compressing the bushing E and forming a water and air tight joint between the lens and the jacket. In the event of breakage of the lens it is necessary merely to unscrew the nut G which permits the broken lens to be readily removed and re placed.

Referring now to Fig. 2, the frame and jacket instead of being integral as in Fig. 1, comprise a metal support A preferably of punched steel, having an integral, turned down, screw-threaded lip A to which is secured the metal jacket A having a flange a which rests upon the top of the frame. The inner wall of the jacketA is tapered throughout its entire length and the lens B has a corresponding taper. Ihe compressible bushing E extends substantially from top to bottom of the lens and said lens is drawn into place and secured in the same manner as in the construction shown in Fig. 1.

In the form of my invention shown in Figs. 4: and 5 T-shaped slots B and grooves B are provided on opposite sides of the lens B adapted to receive the T-shaped bolts C (Fig. 7), and the jacket A is provided with inturned lugs A having slots A (Fig. 5) to permit the passage therethrough of the threaded ends of the bolts C provided with the nuts G for securing the lens in operative position.

The construction shown in Fig. 6 is the same as that shown in Figs. 4 and 5 except that the fastening bolts C are wire rods having an elbow or bend at the top forming a head adapted to fit within apertures or slots B onopposite sides of the lens.

The construction above described is simple, and provides eiiicient means for securing the lens and for its removal in case of breakage. The compressible rubber bushing between the lens and jacket not only provides an air and water tight joint, but also takes up the expansion and contraction of the metal frame and jacket; furthermore, as the bushing is substantially flush with the top of the jacket it tends to prevent slipping, this-fact being of considerable importance where the device according to common practice is used as a basement light set in sidewalks.-

I claim:

1. A device of the class described, comarisin a lens havin a recess therein a jacket, a compressible bushingib'etweensaid lens and jacket, and means comprising an elongate fastener fitting into said recessat one end and connected at the other end to the jacket, to secure said lens within said jacket with said bushing compressed the-rebetween.

2. A device of the class described,-comprising a lens having a slot, a jacket, a compressible bushing between said lens and jacket, and means comprising a detached fastener having one end in' said lens slot and connected at the other end'to saidjacket to secure said lens within said jacket with said bushing compressed therebetween.

3. A device of the class described com prising a lens having a recess therein, a jacket, a compressible bushing between said lens and jacket, and means comprising an elongate fastener fitting into said recess at one end and connected at the other end to the jacket, to secure said lens within said jacket with said bushing compressed therebetween, the said means being connected to the lens at a point below the top thereof.

4. A device of the class described com 6. Adevice of the class described com prisinga tapered lens having a slot, a jacket having aiEtPGIGQl -IIIHGI' wall and a lugprov1ded=w1th a:bolt aperture, a compresslble bushing-between said lens and said acket, and means to=holdsa1dlens w1th1n said jacket with said: bushing compressed therebetween, comprising a bolt adapted to pass through said bolt aperture and having a headadapted to rest within said slot in said lens.

7. A device of the character described comprising a tapered lens, a jacket having a tapered innerwall, a compressible packing between said lens and said jacket, and means comprising a boltconnected directly to the lens at one end and arrangedto force the lens "directly intothe jacket, thereby to compress the packing tightly between the lens and the jacket.

Signed'by me at New York, N. Y., this sixth (6th) day of November, 1916.

WVII JLIAM L WALKER.

Witnesses:

JOHN S. Donnnmcn, ARTHUR FURMAN.

Copies otthis patent may be obtainedtor five cents each, by addressing the c'bmmissionerof ream;

Washington, D. 0. 

